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Chapter 2- Physics
Newton's Laws of Motion
whirl a rock at the end of a string and it follows a circular path. If the string breaks, the rock tends to
follow a straight - line path
a sheet of paper can be pulled from beneath a box of cereal without toppling it if the paper is jerked quickly. This is best demonstrates that
the box has inertia
a hockey puck slides across a frozen pond. If ice friction and air resistance are neglected, the force needed to keep the puck sliding at constant velocity is
earth moves about 30 km/s relative to the sun. when you jump upward in front of a wall, the wall doesn't slam into you at 30 km/s because the wall
and you move at the same horizontal speed, before, during, and after your jump
a roller coaster car at an amusement park carrying 1 passenger takes 3 min to make its ride from start to finish. Neglecting friction, a car with 5 passengers would take
the same time
to steadily (constantly) increase the velocity of something requires a
a given net force propels an object along a straight-line path. if the net force were doubled, its acceleration would
a push on a 1 kg brick accelerates the brick. neglecting friction, to equally accelerate a 10 kg brick requires the force to be
10 times as much
a car has a mass of 1000 kg and accelerates at 2 m/s^2. what is the magnitude of the force exerted on the car?
a girl pulls on a 10 kg wagon with a constant force of 30 N. what is the wagon's acceleration?
A commercial jet has a mass of 5,000 kg and the thrust of its engine is 10,000 N. the acceleration of the jet when taking off is
A 10 kg block is pushed across a horizontal surface with a horizontal force of 30 N against a friction force of 10 N. the acceleration of the block is
a 10 kg brick and a 1 kg book are are dropped in a vacuum. the force of gravity on the 10 kg brick is
10 times as much as the force on the 1 kg book
when you toss a coin straight up, it moves upward, turns around, an drops. during this time the acceleration of the coin is
downward and constant
a 10 N falling object encounters 4 N of air resistance. the net force on it is
drop a rock from a 5 m height and it accelerates at 10 m/s^2 and strikes the ground in
when a skydiver of mass 100 kg experiences air resistance of 400 N, her acceleration is
a light woman and a heavy man jump from an airplane at the same time and open their same size parachutes at the same time. which person will get to a state of zero acceleration first?
the light woman
when a 500 N parachutist opens his chute and experiences 800 N of air resistance, the net force on him is
300 N upward
Action and reaction forces comprise the parts of
a single interaction
when a baseball player hits a ball with a force of 1000 N, the ball exerts force on the bat of
an archer shoots an arrow. if the action force is the bowstring on the arrow, the reaction is the
arrow's push on the bowstring
as a ball falls, the action force is the pull of Earth's mass on the ball. the reaction force is the
pull of the ball's mass on Earth
a Mack truck and a Mini Cooper traveling at the same speed collide head on. the collision force is greatest on
the same for both
arnold strongman and suzie small have a tug of war on a polished floor. arnold wears socks and suzie wears gym shoes. the likely winner is